Aṣṭādhyāyī, 5, 2, 6.0 yathāmukhasaṃmukhasya darśanaḥ khaḥ //

VNSūtraV zu VNSūtra, 7.1, 7.0 itthaṃ nānābhedollāsaprakāśarūpeṣu varṇanivahodayeṣu madhyāt prativarṇāntare vākcatuṣṭayakrameṇa akhaṇḍitavṛttyā svasvarūpam aparityajya yathāmukhopadiṣṭanītyā svara eva prathate ity uktaṃ bhavati //